e later.""Duan Jinjiang gritted his teeth and said, "How could I not know what you're saying It's just that this matter is deeply involved. What we see on the surface now is only a small part of the v...sumed a lot recently, and the exploration of saltpeter mines was not extensive before. Now that we urgently need it, there is no time to explore again. I heard that your Jin Kingdom has several saltp...